Electromechanical lamp



April 24, 1934- C. BERNAscoNI Er Al. 1,956,339

ELECTRQMECHAN I CAL LAMP Fil'ed June 50, 1930 'Imlnumnnnw Patented Apr.24, 1934 ELECTROMECHANICAL LAMP Charles Bernasconi and Ren MarieBerthier,

Savoy, France Application June 30, 1930, Serial No. 464,987

In Germany July 2, 1929 l 2 Claims. ",(ol. 24o-10.5)

i The present invention relates to an improvement of theelectro-mechanical lamp forming the subject of the prior United Statesof America Patent No. 1,678,496 of July 24th, 1928, that is to say, alamp consisting of an electro-magnetic machine, mechanism for actuatingthe movable portion of the machine, an incandescent lamp, and a casingenclosing the whole.

In -the case of the aforesaid lamp it has been found that,l in certaininstances, it would be desirable to attach some of the xed, or immovableparts of the mechanism in such a way that, instead of being embedded inthe material of the lamp casing, as previously claimed, they areindirectly secured to the casing by means of members so embedded.

The novelty consists therefore in that, in a casing formed of severalshells of moulded material, the xed or immovable parts of the mechanism(the bearings for the shafts and mechanism of the machine and the partsconnecting the incandescent lamp to the machine) are in part held inposition simply by being embedded in the material of which the casing ismade, and are in part detachably mounted on members` similarly embeddedin the material of the casing.

A method of manufacturing these lamps is as follows:

'Ihe material of which each of the shells of the casing is composed isplaced in an open mould. By means of a first ram, the necessary recessesand gaps for the stationary parts of the machine (the fixed parts of themechanism and members for securing same, the bearings for theshafts ofthe machine and the last named, together with the members for securingsame, and also the connections) are pressed into the material. The partsto be embedded in the casing material are then temporarily attached toone or more other rams, by means of which rams they are inserted in therecesses previously provided in the material of the shells, and aresecured therein by applying 'a somewhat more powerful 'pressure to thematerial, whereby the temporary attachment of all said parts to the ramor rams is released. 1

The drawing illustrates one embodiment of the lamp, which, in theexample shown, is a pocket lamp. v

Figure 1 is a longitudinal section,

Figure 2 a front elevation, one shell of the casing being removed,

vFigure 3 shows an interior view of the shell detached from Figure 2,

Figure 4 is a cross section.

The electromagnetic machine according to this embodiment comprises arotary induction 'coil l and a fixed armature 2.

The induction coil 1 is provided with a permanent magnet 3, of discpattern, and is recessed at 6 so that four external poles result, and abody 60 5 of heavy metal, such as lead, which serves to increase themass of the armature and also takes the form of a disc, filling therecesses 6 of the magnet, the whole forming a cylinder with two circularflat end faces. The induction coil 1 is o5 keyed on a shaft 7 carrying apinion 8 meshing with a gear 9 firmly mounted on a shaft l0 carrying a'loose pinion 11 meshing with a rack 12. The teeth of the rack are cut ina bar 13 which, on the one hand, is subjected to a spring 14I operat- 70ingby compression, and, on the other hand, is provided with a curvedhandle 15 which is actuated by the hand in which the lamp is carried,when the induction coil 1 is to be set in rotary motion. The spring 14is threaded on a rod which 75 is adapted to slide inside the bar 13.Between the pinionll and the gear 9 is interposed a clutch 16 whichenables the gear 9 to be actuated by the pinion 11 only when the latteris rotated in the one direction, dorresponding to the manual dis- 30placement of the rack 12. The bar 13 is partly housed in aguide 17having the cross sectional form of a rectangular tube which is cut awayat 18 for the accommodation of the pinion 11, and also at 19 for theaccommodation of a stop 20 g5 which limits the outward travel of the bar13 under the action of the spring 14.

The ends of the shafts 7, 10 are mounted in sleeves carried by metaldiscs 36.

The armature 2 consists of two parts, of mag- 90 netic material andcrescent form, surrounding the induction coil l and also includes thetwo coils 24,

25 associated with the respective parts of the armature.

The sleeve 71, reiiector and all themembers 95 supporting theincandescent bulb31, are provided y and mounted as in the main PatentNo. 1,678,496.

In the present instance, however, the pole pieces ofthe stationaryarmature 2 are secured by means of four bolts which screw into nuts 81em- 100 bedded in the casing, so that the armature 2, with the windings24, -25, can be removed at any time. The same applies to the guidemember 17, which is secured by two bolts 82 screwed into nuts 83embedded in the casing. To enable these bolts 105 82 to be screwed homeand loosened, the necessary recesses 84 are provided in the guide 17.

The two contact springs 33and 28 are also secured by means of bolts 85and 86, and nuts 87. embedded in the casing. 'Ihese nuts are con- 110ings, an armature having a shaft journaled at its ends in alinedopenings of said bearing members, a pinion on said shaft, eld elementscar- .ried by one of the casing sections for cooperation l with saidarmature, a lamp, connections from the field elements to said lamp, adrive shaft journaled at its ends in other alined openings of saidbearing members, a gear on said drive shaft in mesh with the pinion ofthe armature shaft, a

rack bar casing extended across the bearing member of one of said casingsections, nuts embedded -in the latter casing section, screws extendingthrough said rack bar casing into said nuts to positively removablyfasten said rack bar casing .nected with the series windings 24, 25 ofthe to the last mentioned casing section, a rack bar slidably mountedwithin said rack bar casing, and a pinion on said rack bar.

2. An electro-mechanical lamp comprising a divided casing composed ofseparably connected sections, bearing members embedded in said casingsections and having shaft end receiving openl ings, an armature having ashaft journaled at its ends in alined openings of said bearing members,a pinion on said shaft, eld elements carried by one of the casingsections for cooperation with said armature, a. lamp, connections fromthe eld elements to said lamp, a drive shaft joumaled at its ends inother alined openings of said bearing members, a gear on said driveshaft in mesh with the pinion of the armature shaft, a rack bar casingextending across the bearing member of one of said casing sections,means positively and removably fastening said rack bar casing to thelast mentioned casing section, a. rack bar vslidably mounted within saidrack bar casing, and a pinion on said drive shaft in mesh with said rackbar.

CHAELES BERNASCONI. RENE MARIE BERTHIER.

drive shaft in mesh with said I

